The barrels of modern Zouave reproduction rifles are quite heavy & robust, and Zoli is a reputable maker. The rifle was proof tested before it was exported. Unless the bore has significant rust, pitting and corrosion, or the nipple threads are badly worn or corroded, then most likely the rifle is quite sound.
These large bore guns are proof tested to handle nearly twice the maximum loads, and can actually safely handle maybe even 3 times the amount of powder that the average responsible shooter would ever load into one.
Modern high strength steel was used for the barrel.
Make sure that the barrel is really clean and then go from there.
If you still feel the need to have it inspected, then take it to a trustworthy local gunsmith that's knowledgeable about black powder guns.
